The article talks about new technology in modern rail cars and engines, focusing on light rail systems. These new designs have low floors to make it easier for passengers to get on and off. There is also more use of electrical and electronic parts in these new trains. Diesel Multiple Unit (DMU) cars, popular in Europe, are starting to be used more in the U.S. The article also mentions regulations affecting DMU use and the growth of the transit market in the U.S. It discusses high-speed rail, fare collection methods, and how different modes of transportation connect.